))
Piecewise((gamma(y + 1), re(y) > -1), (Integral(x**y*exp(-x), (x, 0, oo)), True)) #分段函数
泰勒展开
>>> series...(sin(x)) # 默认余项次数为6,在 x=0 处展开
x - x**3/6 + x**5/120 + O(x**6)
>>> series(exp(x), x, 1, n= 3)#在 x=1 处展开...(x) + cos(x)/2)
级数求和
>>> i, n = var("i n")
>>> summation(i, (i, 1, n)) #summation函数用于级数求和
n**2/2 + n/...>>> from sympy.integrals.transforms import inverse_laplace_transform
>>> from sympy import exp, Symbol...>>> from sympy import fourier_transform, exp
>>> from sympy.abc import x, k
>>> fourier_transform(exp